Changes of Fusarium in rhizosphere soil under potato continuous cropping systems in arid-irrigated area of Gansu Province

Abstract

Abstract: For a thorough understanding of the relationships between the distribution of Fusarium in rhizosphere soil and potato continuous cropping systems, the changes of Fusarium in rhizosphere soil under potato continuous cropping and rotation cropping were studied by way of root debris separation using the cultivar Atlantic. There were 8 species of Fusarium from rhizosphere soils of different rotations. F. proliferatum was the dominant species of corn-potato rotation systems with a separation frequency up to 23.34%, but in rhizosphere soils of potato continuously cropped for 1-3 years, F. solani was the dominant species with separation frequencies up to 30.78%, 37.70% and 45.48%. With long term continuous cropping of potato, the total amount of Fusarium tended to increase but there were changes in the different Fusarium species. The amounts of F. solani and F. oxysporum increased while the amounts of F. culmorum and F. proliferatum decreased, and the amount of F. equesiti did not changed.

CLC Number:

S435.32

NIU Xiu-qun, LI Jin-hua, ZHANG Jun-lian, SHEN Bao-yun, CHAI Zhao-xiang, WANG Di. Changes of Fusarium in rhizosphere soil under potato continuous cropping systems in arid-irrigated area of Gansu Province[J]. Acta Prataculturae Sinica, 2011, 20(4): 236-243.

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